Should we start pushing space travel, to save us all?

[Arnold_Winkelried]

Rainbowscr, you say

Perhaps cheaper, more efficient ways to reach and colonize another world? Look at the millions of immigrants who came to the States with a 50 year period! If there is a need, a way is always found.

All that accomplished is helping the USA get as crowded as Western Europe. The population of Western Europe did not noticeably diminish due to the migration.

With space exploration, all you are doing is starting a human population group in another area, but you are not going to have an appreciable difference on the number of human beings inhabiting earth.